Impact of Primary Solids Sizes in Interior Design on Children's Behavior (Improving Physical and Psychological Ability for Children)Abstract:Prior studies focused on a variety of stimuli that draw children's attention, including those emitted by nearby objects and shapes that serve as sensory stimulus for children. This aspect is presented in terms of interior design by using primary solids of various sizes and shapes to study their impact on children's behavior. This study aims to demonstrates their uses that enhances children's mental and physical abilities by study two experiments that presenting: First, it was concluded that there is a difference in the use of different sizes between the ages of six and eight, which is accompanied by a spontaneous increase in interest in small models. A second experiment concluded that varying volume improved the performance of 6-year-old children. Explicit emotions increased interest in models at all ages, and small-scale drawings were associated with an active attention strategy. These studies add to the evidence that variation in shape size has no effect on developmental stages and may instead reflect children's use of different attention strategies. CITATION Sut98 \l 1033 (Suttona & Roseb, 1998). The research issue negotiates